US5402413A
Expired / Lapsed
US
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Three-cell wireless communication system
Assignee: Intel Corp
•
Filing: 1991-04-08
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Granted: 1995-03-28
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Expires: 2011-04-08
Abstract
Abstract A wireless communication system including a repeated pattern of cells, in which base station transmitters and user station transmitters for each cell may be assigned a spread-spectrum code for modulating radio signal communication in that cell. Radio signals used in that cell are spread across a bandwidth sufficiently wide that both base station receivers and user station receivers in an adjacent cell may distinguish communication which originates in one cell from another. Adjacent cells may use distinguishable frequencies and distinguishable codes, but it is sufficient if adjacent cells use distinguishable frequencies and identical codes. A repeated pattern of cells allows the codes each to be reused in a plurality of cells.
Inventors
- 👤 Robert C. Dixon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:03
CPC Classifications
H; H04; H04W; H04W16/00; H04W16/02; H04W16/12; H04J; H04J13/00; H04J13/16; H04B; H04B2201/00; H04B2201/69; H04B2201/707; H04B2201/70702
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
144 words
A time division multiple access wireless communication system, comprising a repeated pattern of three cells, each cell having a base station; and a user station; wherein said base station and said user station communicate using time division multiple access; wherein transmitters in a first cell are assigned a first spread-spectrum code for modulating radio communication in said first cell; whereby radio signals used in said first cell are spread across a bandwidth sufficiently wide that receivers in a second cell, said second cell being adjacent to said first cell, may distinguish communication which originates in said first cell from communication which originates in said second cell; and whereby said first spread-spectrum code is reused in a plurality of cells such that said first cell in said pattern using said first spread-spectrum code is not adjacent to any other cell using said first spread-spectrum code.
Claim 2
Dependent Claim
144 words
A time division multiple access wireless communication system, comprising a repeated pattern of three cells, each cell having a base station; and a user station; wherein said base station and said user station communicate using time division multiple access; wherein transmitters in a first cell are assigned a first spread-spectrum code for modulating radio communication in said first cell; whereby radio signals used in said first cell are spread across a bandwidth sufficiently wide that receivers in a second cell, said second cell being adjacent to said first cell, may distinguish communication which originates in said first cell from communication which originates in said second cell; and whereby said first spread-spectrum code is reused in a plurality of cells such that said first cell in said pattern using said first spread-spectrum code is not adjacent to any other cell using said first spread-spectrum code.
Claim 3
Dependent Claim
27 words
A time division multiple access wireless communication system as in claim 1, wherein said repeated pattern comprises a configuration which is repeated along three mutually orthogonal axes.
Claim 4
Dependent Claim
26 words
A time division multiple access wireless communication system as in claim 1, wherein said user station transmitters emit data communication messages which include station identification information.
Claim 5
Dependent Claim
21 words
A time division multiple access wireless communication system as in claim 1, wherein said codes are assigned dynamically for each cell.
Claim 6
Dependent Claim
168 words
A time division multiple access wireless communication system, comprising a repeated pattern of cells, each cell having a base station; and a user station; wherein said base station and said user station communicate using time division multiple access; wherein transmitters in a first cell are assigned a first spread-spectrum code for modulating radio communication in said first cell; whereby radio signals used in said first cell are spread across a bandwidth sufficiently wide that receivers in a second cell, said second cell being adjacent to said first cell, may distinguish communication which originates in said first cell from communication which originates in said second cell; whereby said first spread-spectrum code is reused in a plurality of cells such that said first cell in said pattern using said first spread-spectrum code is not adjacent to any other cell using said first spread-spectrum code; and wherein said codes are assigned dynamically for each cell by each of a plurality of independent communication systems, after accounting for use by other systems.
Claim 7
Dependent Claim
168 words
A time division multiple access wireless communication system, comprising a repeated pattern of cells, each cell having a base station; and a user station; wherein said base station and said user station communicate using time division multiple access; wherein transmitters in a first cell are assigned a first spread-spectrum code for modulating radio communication in said first cell; whereby radio signals used in said first cell are spread across a bandwidth sufficiently wide that receivers in a second cell, said second cell being adjacent to said first cell, may distinguish communication which originates in said first cell from communication which originates in said second cell; whereby said first spread-spectrum code is reused in a plurality of cells such that said first cell in said pattern using said first spread-spectrum code is not adjacent to any other cell using said first spread-spectrum code; and wherein said codes are assigned dynamically for each cell by each of a plurality of independent communication systems, after accounting for use by other systems.
Claim 8
Dependent Claim
18 words
A time division multiple access wireless communication system as in claim 5, wherein said use is concurrent use.
Claim 9
Dependent Claim
18 words
A time division multiple access wireless communication system as in claim 5, wherein said use is prior use.
Claim 10
Dependent Claim
24 words
A time division multiple access wireless communication system as in claim 1, wherein said codes comprise a set of codes with minimal cross-correlation attributes.
Claim 11
Dependent Claim
34 words
A time division multiple access wireless communication system as in claim 6, wherein said codes comprise a limited number of predetermined codes; and wherein said repeated pattern consists essentially of three classes of cells.
Claim 12
Dependent Claim
18 words
A time division multiple access wireless communication system as in claim 9, wherein said limited number is three.
Claim 13
Dependent Claim
22 words
A time division multiple access wireless communication system as in claim 9, further comprising means for frequency division in said base stations.
Claim 14
Dependent Claim
20 words
A time division multiple access wireless communication system as in claim 11, wherein a plurality of frequencies are assigned dynamically.
Claim 15
Dependent Claim
36 words
A time division multiple access wireless communication system as in claim 11, wherein a plurality of frequencies are assigned dynamically by each of a plurality of independent communication systems, after accounting for use by other systems.
Claim 16
Dependent Claim
18 words
A time division multiple access wireless communication system as in claim 13, wherein said use is concurrent use.
Claim 17
Dependent Claim
18 words
A time division multiple access wireless communication system as in claim 13, wherein said use is prior use.
Claim 18
Dependent Claim
23 words
A time division multiple access wireless communication system as in claim 1, wherein said repeated pattern consists essentially of three classes of cells.
Claim 19
Dependent Claim
110 words
A time division multiple access wireless communication system as in claim 1, wherein said repeated pattern consists essentially of a first class of cells, a second class of cells, and a third class of cells; wherein no member of said first class is adjacent to another member of said first class, no member of said second class is adjacent to another member of said second class, and no member of said third class is adjacent to another member of said third class; said first class being assigned a first spread-spectrum code, said second class being assigned a second spread-spectrum code, and said third class being assigned a third spread-spectrum code.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-03-27 | 1998-09-26 | 1999-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-03-27 | 2002-09-26 | 2003-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-03-27 | 2006-09-26 | 2007-03-28 | $7700.00 | Window Closed / Lapsed |